Piezoelectric device including substantially parallel propagatio

Details Piezoelectric device including substantially parallel propagatio Piezoelectric device including substantially parallel propagatio

1995-02-23

1997-01-14

Lee, Benny

Wave transmission lines and networks

Coupling networks

Electromechanical filter

333187, 333185, H03H 900

Patent

active

055943969

ABSTRACT:
A piezoelectric device which has a piezoelectric substrate and a plurality of piezoelectric resonators provided on the substrate. The piezoelectric resonators are an energy-confining type, and when a voltage is impressed on the piezoelectric resonators, each of the piezoelectric resonators generates a primary vibration in a direction of the thickness of the substrate and a secondary vibration in a direction on the surface of the substrate. The secondary vibration, in the form of an oscillatory wave, is propagated on the surface of the substrate and is attenuated gradually. At least two of the piezoelectric resonators have propagation paths of secondary vibrations which are substantially parallel to each other so as not to intersect within the substrate.

REFERENCES:
patent: 4196407 (1980-04-01), Masaie et al.
patent: 4234860 (1980-11-01), Schumacher et al.
patent: 4821004 (1989-04-01), Defranould et al.

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